<template>
  <div class='sub-sort'>
    <div class="sort">
      <a href="javascript:;" :class="{active: sortParams.sortField === null}"  @click="change(null)">默认排序</a>  
      <a href="javascript:;" :class="{active: sortParams.sortField === 'publishTime'}" @click="change('publishTime')">最新商品</a>
      <a href="javascript:;" :class="{active: sortParams.sortField === 'orderNum'}" @click="change('orderNum')">最高人气</a>
      <a href="javascript:;" :class="{active: sortParams.sortField === 'evaluateNum'}" @click="change('evaluateNum')">评论最多</a>
      <a href="javascript:;" @click="change('price')">
        价格排序
        <i class="arrow up" :class="{active: sortParams.sortField === 'price' && sortParams.sortMethod === 'asc'}"/>
        <i class="arrow down" :class="{active: sortParams.sortField === 'price' && sortParams.sortMethod === 'desc'}"/>
      </a>
    </div>
    <div class="check">
      <XtxCheckbox @click="changeCheck"  v-model="sortParams.inventory">仅显示有货商品</XtxCheckbox>
      <XtxCheckbox @click="changeCheck" v-model="sortParams.onlyDiscount">仅显示特惠商品</XtxCheckbox>
    </div>
  </div>
</template>

<script>
import { reactive } from 'vue'
export default {
    name: 'SubSort',
    setup (props, {emit}) {
        const sortParams = reactive ({
            //库存
            inventory: false,
            // 特惠
            onlyDiscount: false,
            sortField: null,
            sortMethod: null
        })
        const change = (sortField) => {
            //处理价格排序
            if(sortField === 'price') {
                sortParams.sortField = sortField
                //默认情况下的价格排序
                if(sortParams.sortMethod === null) {
                    sortParams.sortMethod = 'desc'
                } else {
                    sortParams.sortMethod = sortParams.sortMethod === 'desc'? 'asc': 'desc'
                }

            } else {
                if(sortParams.sortField === sortField) return
                sortParams.sortField = sortField
                sortParams.sortMethod = null
            }

            emit('changeSort', sortParams)
        }

        const changeCheck = () => {
            emit('changeSort', sortParams)
        }
        return {sortParams, change, changeCheck}
    }


}
</script>

<style lang="less" scoped>
.sub-sort {
  height: 80px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  .sort {
    display: flex;
    a {
      height: 30px;
      line-height: 28px;
      border: 1px solid #e4e4e4;
      padding: 0 20px;
      margin-right: 20px;
      color: #999;
      border-radius: 2px;
      position: relative;
      transition: all .3s;
      &.active {
        background: @xtxColor;
        border-color: @xtxColor;
        color: #fff;
      }
      .arrow {
        position: absolute;
        border: 5px solid transparent;
        right: 8px;
        &.up {
          top: 3px;
          border-bottom-color: #bbb;
            &.active {
            border-bottom-color: @xtxColor;
          }
        }
        &.down {
          top: 15px;
          border-top-color: #bbb;
          &.active {
            border-top-color: @xtxColor;
          }
        }
      }
    }
  }
  .check {
    .xtx-checkbox {
      margin-left: 20px;
      color: #999;
    }
  }
}
</style>